K7B203625A
64Kx36 Synchronous SRAM
- 1 -
Rev 3.0
December 1998
Document Title
64Kx36-Bit Synchronous Burst SRAM
Revision History
Rev. No.
0.0
0.1
1.0
2.0
3.0
History
Initial draft
Change DC Characteristics.
I
CC
value from 320mA to 250mA at -7.
I
CC
value from 300mA to 230mA at -8.
I
CC
value from 280mA to 200mA at -9.
I
SB
value from 90mA to 70mA at -7.
I
SB
value from 80mA to 60mA at -8.
I
SB
value from 70mA to 50mA at -9.
I
SB1
value from 30mA to 20mA
I
SB2
value from 30mA to 20mA
Final spec release.
Add V
DDQ
Supply voltage( 2.5V )
Min t
OH
Parameter Change : from 2.0ns to 3.0ns
Min t
LZC
Parameter Change : from 0ns to 3ns
Draft Date
July. 03. 1998
Sep. 14. 1998
Nov. 16. 1998
Dec. 02. 1998
Dec. 17. 1998
Remark
Preliminary
Preliminary
Fianl
Final
Final
The attached data sheets are prepared and approved by SAMSUNG Electronics. SAMSUNG Electronics CO., LTD. reserve the right to change the
specifications. SAMSUNG Electronics will evaluate and reply to your requests and questions on the parameters of this device. If you have any ques-
tions, please contact the SAMSUNG branch office near your office, call or contact Headquarters.
K7B203625A
64Kx36 Synchronous SRAM
- 2 -
Rev 3.0
December 1998
WEc
WEd
FAST ACCESS TIMES
PARAMETER
Symbol
-75
-80
-90
Unit
Cycle Time
t
CYC
8.5
10
12
ns
Clock Access Time
t
CD
7.5
8
9
ns
Output Enable Access Time
t
OE
3.5
3.5
3.5
ns
64Kx36-Bit Synchronous Burst SRAM
The K7B203625A is 2,359,296 bits Synchronous Static Ran-
dom Access Memory designed to support zero wait state per-
formance for advanced Pentium/Power PC based system. And
with CS
1
high, ADSP is blocked to control signals.
It can be organized as 64K words of 36 bits. And it integrates
address and control registers, a 2-bit burst address counter and
high output drive circuitry onto a single integrated circuit for
reduced components counts implementation of high perfor-
mance cache RAM applications.
Write cycles are internally self-timed and synchronous.
The self-timed write feature eliminates complex off chip write
pulse shaping logic, simplifying the cache design and further
reducing the component count.
Burst cycle can be initiated with either the address status pro-
cessor(ADSP) or address status cache controller(ADSC)
inputs. Subsequent burst addresses are generated internally in
the system
s burst sequence and are controlled by the burst
address advance(ADV) input.
ZZ pin controls Power Down State and reduces Stand-by cur-
rent regardless of CLK.
The K7B203625A is implemented with SAMSUNG
s high per-
formance CMOS technology and is available in a 100pin TQFP
package. Multiple power and ground pins are utilized to mini-
mize ground bounce.
GENERAL DESCRIPTION
FEATURES
LOGIC BLOCK DIAGRAM
Synchronous Operation.
On-Chip Address Counter.
Write Self-Timed Cycle.
On-Chip Address and Control Registers.
V
DD
= 3.3V+0.3V/-0.165V Power Supply.
V
DDQ
Supply Voltage 3.3V+0.3V/-0.165V for 3.3V I/O
or 2.5V+0.4V/-0.125V for 2.5V I/O.
5V Tolerant Inputs except I/O Pins.
Byte Writable Function.
Global Write Enable Controls a full bus-width write.
Power Down State via ZZ Signal.
Asynchronous Output Enable Control.
ADSP, ADSC, ADV Burst Control Pins.
LBO Pin allows a choice of either a interleaved burst or a linear
burst.
Three Chip Enables for simple depth expansion with No Data
Contention.
TTL-Level Three-State Output.
100-TQFP-1420A
CLK
LBO
ADV
ADSC
ADSP
CS
1
CS
2
CS
2
GW
BW
WEa
WEb
OE
ZZ
DQa
0
~ DQd
7
DQPa ~ DQPd
BURST CONTROL
LOGIC
BURST
64Kx36
ADDRESS
CONTROL
OUTPUT
DATA-IN
ADDRESS
COUNTER
MEMORY
ARRAY
REGISTER
REGISTER
BUFFER
LOGIC
C
O
N
T
R
O
L
R
E
G
I
S
T
E
R
C
O
N
T
R
O
L
R
E
G
I
S
T
E
R
A
0
~A
1
A
0
~A
1
A
2
~A
15
A
0
~A
15
K7B203625A
64Kx36 Synchronous SRAM
- 3 -
Rev 3.0
December 1998
PIN CONFIGURATION
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
100 Pin TQFP
(20mm x 14mm)
DQPc
DQc
0
DQc
1
V
DDQ
V
SSQ
DQc
2
DQc
3
DQc
4
DQc
5
V
SSQ
V
DDQ
DQc
6
DQc
7
N.C.
V
DD
N.C.
V
SS
DQd
0
DQd
1
V
DDQ
V
SSQ
DQd
2
DQd
3
DQd
4
DQd
5
V
SSQ
V
DDQ
DQd
6
DQd
7
DQPd
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
DQPb
DQb
7
DQb
6
V
DDQ
V
SSQ
DQb
5
DQb
4
DQb
3
DQb
2
V
SSQ
V
DDQ
DQb
1
DQb
0
V
SS
N.C.
V
DD
ZZ
DQa
7
DQa
6
V
DDQ
V
SSQ
DQa
5
DQa
4
DQa
3
DQa
2
V
SSQ
V
DDQ
DQa
1
DQa
0
DQPa
1
0
0
9
9
9
8
9
7
9
6
9
5
9
4
9
3
9
2
9
1
9
0
8
9
8
8
8
7
8
6
8
5
8
4
8
3
8
2
A
6
A
7
C
S
1
C
S
2
W
E
d
W
E
c
W
E
b
W
E
a
C
S
2
V
D
D
V
S
S
C
L
K
G
W
B
W
O
E
A
D
S
C
A
D
S
P
A
D
V
A
8
8
1
A
9
5
0
4
9
4
8
4
7
4
6
4
5
4
4
4
3
4
2
4
1
4
0
3
9
3
8
3
7
3
6
3
5
3
4
3
3
3
2
N
.
C
.
A
1
5
A
1
4
A
1
3
A
1
2
A
1
1
A
1
0
N
.
C
.
N
.
C
.
V
D
D
V
S
S
N
.
C
.
N
.
C
.
A
0
A
1
A
2
A
3
A
4
A
5
3
1
L
B
O
PIN NAME
SYMBOL
PIN NAME
TQFP PIN NO.
SYMBOL
PIN NAME
TQFP PIN NO.
A
0
- A
15
ADV
ADSP
ADSC
CLK
CS
1
CS
2
CS
2
WEx
OE
GW
BW
ZZ
LBO
Address Inputs
Burst Address Advance
Address Status Processor
Address Status Controller
Clock
Chip Select
Chip Select
Chip Select
Byte Write Inputs
Output Enable
Global Write Enable
Byte Write Enable
Power Down Input
Burst Mode Control
32,33,34,35,36,37,
44,45,46,47,48,49,
81,82,99,100
83
84
85
89
98
97
92
93,94,95,96
86
88
87
64
31
V
DD
V
SS
N.C.
DQa
0
~a
7
DQb
0
~b
7
DQc
0
~c
7
DQd
0
~d
7
DQPa~Pd
V
DDQ
V
SSQ
Power Supply(+3.3V)
Ground
No Connect
Data Inputs/Outputs
Output Power Supply
(2.5V or 3.3V)
Output Ground
15,41,65,91
17,40,67,90
14,16,38,39,42,43,50,66
52,53,56,57,58,59,62,63
68,69,72,73,74,75,78,79
2,3,6,7,8,9,12,13
18,19,22,23,24,25,28,29
51,80,1,30
4,11,20,27,54,61,70,77
5,10,21,26,55,60,71,76
K7B203625A
64Kx36 Synchronous SRAM
- 4 -
Rev 3.0
December 1998
FUNCTION DESCRIPTION
The K7B203625A is a synchronous SRAM designed to support the burst address accessing sequence of the Pentium and Power PC
based microprocessor. All inputs (with the exception of OE, LBO and ZZ) are sampled on rising clock edges. The start and duration
of the burst access is controlled by ADSC, ADSP and ADV and chip select pins.
When ZZ is pulled high, the SRAM will enter a Power Down State. At this time, internal state of the SRAM is preserved. When ZZ
returns to low, the SRAM normally operates after 2cycles of wake up time. ZZ pin is pulled down internally.
Read cycles are initiated with ADSP(or ADSC) using the new external address clocked into the on-chip address register when both
GW and BW are high or when BW is low and WEa, WEb, WEc, and WEd are high. When ADSP is sampled low, the chip selects are
sampled active, and the output buffer is enabled with OE. the data of cell array accessed by the current address are projected to the
output pins.
Write cycles are also initiated with ADSP(or ADSC) and are differentiated into two kinds of operations; All byte write operation and
individual byte write operation.
All byte write occurs by enabling GW(independent of BW and WEx.), and individual byte write is performed only when GW is high
and BW is low. In K7B203625A, a 64Kx36 organization, WEa controls DQa0 ~ DQa7 and DQPa, WEb controls DQb0 ~ DQb7 and
DQPb, WEc controls DQc0 ~ DQc7 and DQPc and WEd controls DQd0 ~ DQd7 and DQPd.
CS
1
is used to enable the device and conditions internal use of ADSP and is sampled only when a new external address is loaded.
ADV is ignored at the clock edge when ADSP is asserted, but can be sampled on the subsequent clock edges. The address
increases internally for the next access of the burst when ADV is sampled low.
Addresses are generated for the burst access as shown below, The starting point of the burst sequence is provided by the external
address. The burst address counter wraps around to its initial state upon completion. The burst sequence is determined by the state
of the LBO pin. When this pin is Low, linear burst sequence is selected. And this pin is High, Interleaved burst sequence is selected.
BURST SEQUENCE TABLE
(Interleaved Burst)
LBO PIN
HIGH
Case 1
Case 2
Case 3
Case 4
A
1
A
0
A
1
A
0
A
1
A
0
A
1
A
0
First Address
Fourth Address
0
0
1
1
0
1
0
1
0
0
1
1
1
0
1
0
1
1
0
0
0
1
0
1
1
1
0
0
1
0
1
0
BURST SEQUENCE TABLE
(Linear Burst)
Note : 1. LBO pin must be tied to high or low, and floating state must not be allowed.
LBO PIN
LOW
Case 1
Case 2
Case 3
Case 4
A
1
A
0
A
1
A
0
A
1
A
0
A
1
A
0
First Address
Fourth Address
0
0
1
1
0
1
0
1
0
1
1
0
1
0
1
0
1
1
0
0
0
1
0
1
1
0
0
1
1
0
1
0
ASYNCHRONOUS TRUTH TABLE
(See Notes 1 and 2)
:
OPERATION
ZZ
OE
I/O STATUS
Sleep Mode
H
X
High-Z
Read
L
L
DQ
L
H
High-Z
Write
L
X
Din, High-Z
Deselected
L
X
High-Z
Notes
1. X means "Don't Care".
2. ZZ pin is pulled down internally
3. For write cycles that following read cycles, the output buffersmust be
disabled with OE, otherwise data bus contention will occur.
4. Sleep Mode means power down state of which stand-by current
does not depend on cycle time.
5. Deselected means power down state of which stand-by current
depends on cycle time.
K7B203625A
64Kx36 Synchronous SRAM
- 5 -
Rev 3.0
December 1998
SYNCHRONOUS TRUTH TABLE
Notes : 1. X means "Don
t Care".
2. The rising edge of clock is symbolized by
.
3. WRITE = L means Write operation in WRITE TRUTH TABLE.
WRITE = H means Read operation in WRITE TRUTH TABLE.
4. Operation finally depends on status of asynchronous input pins(ZZ and OE).
CS
1
CS
2
CS
2
ADSP
ADS
ADV
WRITE
CLK
ADDRESS ACCESSED
Operation
H
X
X
X
L
X
X
N/A
Not Selected
L
L
X
L
X
X
X
N/A
Not Selected
L
X
H
L
X
X
X
N/A
Not Selected
L
L
X
X
L
X
X
N/A
Not Selected
L
X
H
X
L
X
X
N/A
Not Selected
L
H
L
L
X
X
X
External Address
Begin Burst Read Cycle
L
H
L
H
L
X
L
External Address
Begin Burst Write Cycle
L
H
L
H
L
X
H
External Address
Begin Burst Read Cycle
X
X
X
H
H
L
H
Next Address
Continue Burst Read Cycle
H
X
X
X
H
L
H
Next Address
Continue Burst Read Cycle
X
X
X
H
H
L
L
Next Address
Continue Burst Write Cycle
H
X
X
X
H
L
L
Next Address
Continue Burst Write Cycle
X
X
X
H
H
H
H
Current Address
Suspend Burst Read Cycle
H
X
X
X
H
H
H
Current Address
Suspend Burst Read Cycle
X
X
X
H
H
H
L
Current Address
Suspend Burst Write Cycle
H
X
X
X
H
H
L
Current Address
Suspend Burst Write Cycle
WRITE TRUTH TABLE
Notes : 1. X means "Don
t Care".
2. All inputs in this table must meet setup and hold time around the rising edge of CLK(
).
GW
BW
WEa
WEb
WEc
WEd
OPERATION
H
H
X
X
X
X
READ
H
L
H
H
H
H
READ
H
L
L
H
H
H
WRITE BYTE a
H
L
H
L
H
H
WRITE BYTE b
H
L
H
H
L
L
WRITE BYTE c and d
H
L
L
L
L
L
WRITE ALL BYTEs
L
X
X
X
X
X
WRITE ALL BYTEs
K7B203625A
64Kx36 Synchronous SRAM
- 6 -
Rev 3.0
December 1998
CAPACITANCE*
(T
A
=25
C, f=1MHz)
*Note : Sampled not 100% tested.
PARAMETER
SYMBOL
TEST CONDITION
MIN
MAX
UNIT
Input Capacitance
C
IN
V
IN
=0V
-
5
pF
Output Capacitance
C
OUT
V
OUT
=0V
-
7
pF
ABSOLUTE MAXIMUM RATINGS*
*Notes : Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only
and functional operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
PARAMETER
SYMBOL
RATING
UNIT
Voltage on V
DD
Supply Relative to V
SS
V
DD
-0.3 to 4.6
V
Voltage on V
DDQ
Supply Relative to V
SS
V
DDQ
V
DD
V
Voltage on Input Pin Relative to V
SS
V
IN
-0.3 to 6.0
V
Voltage on I/O Pin Relative to V
SS
V
IO
-0.3 to V
DDQ
+ 0.5
V
Power Dissipation
P
D
1.2
W
Storage Temperature
T
STG
-65 to 150
C
Operating Temperature
T
OPR
0 to 70
C
Storage Temperature Range Under Bias
T
BIAS
-10 to 85
C
OPERATING CONDITIONS at 3.3V I/O
(0
C
T
A
70
C)
PARAMETER
SYMBOL
MIN
Typ.
MAX
UNIT
Supply Voltage
V
DD
3.135
3.3
3.6
V
V
DDQ
3.135
3.3
3.6
V
Ground
V
SS
0
0
0
V
OPERATING CONDITIONS at 2.5V I/O
(0
C
T
A
70
C)
PARAMETER
SYMBOL
MIN
Typ.
MAX
UNIT
Supply Voltage
V
DD
3.135
3.3
3.6
V
V
DDQ
2.375
2.5
2.9
V
Ground
V
SS
0
0
0
V
K7B203625A
64Kx36 Synchronous SRAM
- 7 -
Rev 3.0
December 1998
DC ELECTRICAL CHARACTERISTICS
(T
A
=0 to 70
C, V
DD
=3.3V+0.3V/-0.165V)
* V
IL
(Min)=-2.0(Pulse Width
t
CYC
/
2)
** V
IH
(Max)=4.6(Pulse Width
t
CYC
/
2)
** In Case of I/O Pins, the Max. V
IH
=V
DDQ
+0.5V
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
UNIT
Input Leakage Current(except ZZ)
I
IL
V
DD
=Max , V
IN
=V
SS
to V
DD
-2
+2
A
Output Leakage Current
I
OL
Output Disabled, V
OUT
=V
SS
to V
DDQ
-2
+2
A
Operating Current
I
CC
Device Selected, I
OUT
=0mA,
ZZ
V
IL
, All Inputs=V
IL
or V
IH
Cycle Time
t
CYC
min
-75
-
250
mA
-80
-
230
-90
-
200
Standby Current
I
SB
Device deselected, I
OUT
=0mA,
ZZ
V
IL
, f=Max,
All Inputs
0.2V or
V
DD
-0.2V
-75
-
70
mA
-80
-
60
-90
-
50
I
SB1
Device deselected,I
OUT
=0mA, ZZ
0.2V,
f=0, All Inputs=fixed (V
DD
-0.2V or 0.2V)
-
20
mA
I
SB2
Device deselected, I
OUT
=0mA, ZZ
V
DD
-0.2V,
f=Max, All Inputs
V
IL
or
V
IH
-
20
mA
Output Low Voltage(3.3V I/O)
V
OL
I
OL
= 8.0mA
-
0.4
V
Output High Voltage(3.3V I/O)
V
OH
I
OH
= -4.0mA
2.4
-
V
Output Low Voltage(2.5V I/O)
V
OL
I
OL
= 1.0mA
-
0.4
V
Output High Voltage(2.5V I/O)
V
OH
I
OH
= -1.0mA
2.0
-
V
Input Low Voltage(3.3V I/O)
V
IL
-0.5*
0.8
V
Input High Voltage(3.3V I/O)
V
IH
2.0
V
DD
+0.5**
V
Input Low Voltage(2.5V I/O)
V
IL
-0.3*
0.7
V
Input High Voltage(2.5V I/O)
V
IH
1.7
V
DD
+0.5**
V
TEST CONDITIONS
PARAMETER
VALUE
Input Pulse Level(for 3.3V I/O)
0 to 3V
Input Pulse Level(for 2.5V I/O)
0 to 2.5V
Input Rise and Fall Time(Measured at 0.3V and 2.7V for 3.3V I/O)
1ns
Input Rise and Fall Time(Measured at 0.3V and 2.1V for 2.5V I/O)
1ns
Input and Output Timing Reference Levels for 3.3V I/O
1.5V
Input and Output Timing Reference Levels for 2.5V I/O
V
DDQ
/2
Output Load
See Fig. 1
(V
DD
=3.3V+0.3V/-0.165V,V
DDQ
=3.3V+0.3/-0.165V or V
DD
=3.3V+0.3V/-0.165V,V
DDQ
=2.5V+0.4V/-0.125V, T
A
=0 to 70
C)
K7B203625A
64Kx36 Synchronous SRAM
- 8 -
Rev 3.0
December 1998
AC TIMING CHARACTERISTICS
(T
A
=0 to 70
C, V
DD
=3.3V+0.3V/-0.165V)
Notes : 1. All address inputs must meet the specified setup and hold times for all rising clock edges whenever ADSC and/or ADSP is sampled low and
CS is sampled low. All other synchronous inputs must meet the specified setup and hold times whenever this device is chip selected.
2. Both chip selects must be active whenever ADSC or ADSP is sampled low in order for the this device to remain enabled.
3. ADSC or ADSP must not be asserted for at least 2 Clock after leaving ZZ state.
4. At any given voltage and temperature, t
HZC
is less than t
LZC.
PARAMETER
SYMBOL
-75
-80
-90
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
Cycle Time
t
CYC
8.5
-
10
-
12
-
ns
Clock Access Time
t
CD
-
7.5
-
8
-
9
ns
Output Enable to Data Valid
t
OE
-
3.5
-
3.5
-
3.5
ns
Clock High to Output Low-Z
t
LZC
3
-
3
-
3
-
ns
Output Hold from Clock High
t
OH
3
-
3
-
3
-
ns
Output Enable Low to Output Low-Z
t
LZOE
0
-
0
-
0
-
ns
Output Enable High to Output High-Z
t
HZOE
-
3.5
-
3.5
-
3.5
ns
Clock High to Output High-Z
t
HZC
2
3.5
2
3.5
2
3.5
ns
Clock High Pulse Width
t
CH
3
-
4
-
4.5
-
ns
Clock Low Pulse Width
t
CL
3
-
4
-
4.5
-
ns
Address Setup to Clock High
t
AS
2.0
-
2.0
-
2.0
-
ns
Address Status Setup to Clock High
t
SS
2.0
-
2.0
-
2.0
-
ns
Data Setup to Clock High
t
DS
2.0
-
2.0
-
2.0
-
ns
Write Setup to Clock High
(GW, BW, WE
X
)
t
WS
2.0
-
2.0
-
2.0
-
ns
Address Advance Setup to Clock High
t
ADVS
2.0
-
2.0
-
2.0
-
ns
Chip Select Setup to Clock High
t
CSS
2.0
-
2.0
-
2.0
-
ns
Address Hold from Clock High
t
AH
0.5
-
0.5
-
0.5
-
ns
Address Status Hold from Clock High
t
SH
0.5
-
0.5
-
0.5
-
ns
Data Hold from Clock High
t
DH
0.5
-
0.5
-
0.5
-
ns
Write Hold from Clock High
(GW, BW, WE
X
)
t
WH
0.5
-
0.5
-
0.5
-
ns
Address Advance Hold from Clock High
t
ADVH
0.5
-
0.5
-
0.5
-
ns
Chip Select Hold from Clock High
t
CSH
0.5
-
0.5
-
0.5
-
ns
ZZ High to Power Down
t
PDS
2
-
2
-
2
-
cycle
ZZ Low to Power Up
t
PUS
2
-
2
-
2
-
cycle
Output Load(B)
(for t
LZC
, t
LZOE
, t
HZOE
& t
HZC
)
Dout
5pF*
Fig. 1
* Including Scope and Jig Capacitance
Output Load(A)
Dout
Z0=50
* Capacitive Load consists of all components of
30pF*
the test environment.
RL=50
353
/
1538
+3.3V for 3.3V I/O
319
/
1667
VL=1.5V for 3.3V I/O
V
DDQ
/2 for 2.5V I/O
/+2.5V for 2.5V I/O
K7B203625A
64Kx36 Synchronous SRAM
- 9 -
Rev 3.0
December 1998
C
L
O
C
K
A
D
S
P
A
D
S
C
A
D
D
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S
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:
W
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T
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=
L
m
e
a
n
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=
L
,
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r
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=
H
,
B
W
=
L
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x
.
=
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=
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a
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C
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2
=
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,
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C
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=
L
,
a
n
d
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S
2
=
L
t
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C
L
t
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t
S
H
t
A
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t
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A
1
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2
A
3
B
U
R
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C
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W
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W
B
A
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W
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t
C
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C
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t
A
D
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t
A
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H
t
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t
H
Z
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t
L
Z
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t
C
D
t
O
H
(
A
D
V
I
N
S
E
R
T
S
W
A
I
T
S
T
A
T
E
)
t
H
Z
C
Q
3
-
4
Q
3
-
3
Q
3
-
2
Q
3
-
1
Q
2
-
4
Q
2
-
3
Q
2
-
2
Q
2
-
1
Q
1
-
1
D
o
n
t
C
a
r
e
U
n
d
e
f
i
n
e
d
t
C
Y
C
K7B203625A
64Kx36 Synchronous SRAM
- 10 -
Rev 3.0
December 1998
C
L
O
C
K
A
D
S
P
A
D
S
C
A
D
D
R
E
S
S
W
R
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T
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C
S
A
D
V
D
a
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a
I
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O
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D
a
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C
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t
C
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t
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S
t
S
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t
A
S
t
A
H
A
1
A
2
A
3
(
A
D
S
C
E
X
T
E
N
D
E
D
B
U
R
S
T
)
t
L
Z
O
E
D
2
-
1
D
1
-
1
t
C
S
S
t
C
S
H
(
A
D
V
S
U
S
P
E
N
D
S
B
U
R
S
T
)
D
2
-
2
D
2
-
3
D
2
-
4
D
3
-
1
D
3
-
2
D
3
-
3
D
2
-
2
D
3
-
4
Q
0
-
3
Q
0
-
4
t
S
S
t
S
H
t
W
S
t
W
H
t
A
D
V
S
t
A
D
V
H
t
D
S
t
D
H
T
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M
I
N
G
W
A
V
E
F
O
R
M
O
F
W
R
T
E
C
Y
C
L
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D
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n
t
C
a
r
e
U
n
d
e
f
i
n
e
d
t
C
Y
C
K7B203625A
64Kx36 Synchronous SRAM
- 11 -
Rev 3.0
December 1998
T
I
M
I
N
G
W
A
V
E
F
O
R
M
O
F
C
O
M
B
I
N
A
T
I
O
N
R
E
A
D
/
W
R
T
E
C
Y
C
L
E
(
A
D
S
P
C
O
N
T
R
O
L
L
E
D
,
A
D
S
C
=
H
I
G
H
)
C
L
O
C
K
A
D
S
P
A
D
D
R
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S
S
W
R
I
T
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C
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A
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D
a
t
a
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t
t
C
H
t
C
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S
t
D
H
Q
3
-
3
D
a
t
a
I
n
t
O
E
t
O
H
A
1
A
2
A
3
D
2
-
1
Q
3
-
1
Q
3
-
2
Q
3
-
4
t
S
S
t
S
H
t
A
S
t
A
H
t
W
S
t
W
H
t
A
D
V
S
t
A
D
V
H
t
L
Z
O
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t
H
Z
O
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t
C
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t
H
Z
C
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C
D
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n
t
C
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e
U
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f
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d
t
C
Y
C
Q
1
-
1
K7B203625A
64Kx36 Synchronous SRAM
- 12 -
Rev 3.0
December 1998
T
I
M
I
N
G
W
A
V
E
F
O
R
M
O
F
S
I
N
G
L
E
R
E
A
D
/
W
R
I
T
E
C
Y
C
L
E
(
A
D
S
C
C
O
N
T
R
O
L
L
E
D
,
A
D
S
P
=
H
I
G
H
)
C
L
O
C
K
A
D
S
C
A
D
D
R
E
S
S
W
R
I
T
E
C
S
A
D
V
O
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D
a
t
a
I
n
t
C
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H
Z
O
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D
6
-
1
D
a
t
a
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u
t
t
W
S
t
W
H
t
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D
5
-
1
D
7
-
1
t
W
S
t
W
H
t
L
Z
O
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t
D
H
t
D
S
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
Q
3
-
1
Q
1
-
1
Q
2
-
1
Q
4
-
1
Q
8
-
1
Q
9
-
1
t
C
S
S
t
C
S
H
t
S
S
t
S
H
D
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n
t
C
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r
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U
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f
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n
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d
t
C
Y
C
K7B203625A
64Kx36 Synchronous SRAM
- 13 -
Rev 3.0
December 1998
D
7
-
1
T
I
M
I
N
G
W
A
V
E
F
O
R
M
O
F
S
I
N
G
L
E
R
E
A
D
/
W
R
I
T
E
C
Y
C
L
E
(
A
D
S
P
C
O
N
T
R
O
L
L
E
D
,
A
D
S
C
=
H
I
G
H
)
C
L
O
C
K
A
D
S
P
A
D
D
R
E
S
S
W
R
I
T
E
C
S
A
D
V
O
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D
a
t
a
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n
t
C
H
t
C
L
t
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O
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D
a
t
a
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t
t
A
S
t
A
H
t
C
D
t
O
H
t
O
E
D
5
-
1
t
L
Z
O
E
t
D
H
t
D
S
A
1
A
2
A
3
A
4
A
5
A
6
A
9
Q
3
-
1
Q
1
-
1
Q
2
-
1
Q
4
-
1
Q
8
-
1
Q
9
-
1
t
C
S
S
t
C
S
H
t
S
S
t
S
H
A
7
A
8
D
6
-
1
D
o
n
t
C
a
r
e
U
n
d
e
f
i
n
e
d
t
C
Y
C
K7B203625A
64Kx36 Synchronous SRAM
- 14 -
Rev 3.0
December 1998
T
I
M
I
N
G
W
A
V
E
F
O
R
M
O
F
P
O
W
E
R
D
O
W
N
C
Y
C
L
E
C
L
O
C
K
A
D
S
P
A
D
D
R
E
S
S
W
R
I
T
E
C
S
A
D
V
D
a
t
a
I
n
t
C
H
t
C
L
D
2
-
2
O
E
t
W
H
t
H
Z
O
E
t
L
Z
O
E
D
2
-
1
A
1
t
S
S
t
S
H
D
a
t
a
O
u
t
t
P
U
S
A
2
A
D
S
C
Q
1
-
1
Z
Z
t
A
S
t
A
H
t
C
S
S
t
C
S
H
t
O
E
t
H
Z
C
t
P
D
S
S
l
e
e
p
S
t
a
t
e
Z
Z
S
e
t
u
p
C
y
c
l
e
N
o
r
m
a
l
O
p
e
r
a
t
i
o
n
M
o
d
e
Z
Z
R
e
c
o
v
e
r
y
C
y
c
l
e
t
W
S
D
o
n
t
C
a
r
e
U
n
d
e
f
i
n
e
d
t
C
Y
C
K7B203625A
64Kx36 Synchronous SRAM
- 15 -
Rev 3.0
December 1998
APPLICATION INFORMATION
The Samsung 64Kx36 Synchronous Burst SRAM has two additional chip selects for simple depth expansion.
DEPTH EXPANSION
This permits easy secondary cache upgrades from 64K depth to 128K depth without extra logic.
Data
Address
CLK
ADS
Microprocessor
CS
2
CS
2
CLK
ADSC
WEx
OE
CS
1
Address
Data
ADV
ADSP
64Kx36
SB
SRAM
(Bank 0)
CS
2
CS
2
CLK
ADSC
WEx
OE
CS
1
Address
Data
ADV
ADSP
64Kx36
SB
SRAM
(Bank 1)
CLK
Address
Cache
Controller
A
[0:16]
A
[16]
A
[0:15]
A
[
16
]
A
[
0:15
]
I/O
[0:71]
64-bits
CLOCK
ADSP
ADDRESS
Data Out
INTERLEAVE READ TIMING
(Refer to non-interleave write timing for interleave write timing)
Bank 0 is selected by CS
2
, and Bank 1 deselected by CS
2
Q1-1
Q1-2
Q1-4
Q1-3
OE
Data Out
t
SS
t
SH
A1
A2
WRITE
CS
1
A
n+1
ADV
(Bank 0)
(Bank 1)
Q2-1
Q2-2
Q2-4
Q2-3
t
AS
t
AH
t
CSS
t
CSH
t
WS
t
WH
t
ADVS
t
ADVH
t
OE
t
LZOE
t
HZC
Bank 0 is deselected by CS
2
, and Bank 1 selected by CS
2
[0:n]
Don
t Care
Undefined
t
CD
t
LZC
*NOTES n = 14 32K depth, 15 64K depth, 16 128K depth
(ADSP CONTROLLED , ADSC=HiGH)
K7B203625A
64Kx36 Synchronous SRAM
- 16 -
Rev 3.0
December 1998
0.10 MAX
0~8
22.00
0.30
20.00
0.20
16.00
0.30
14.00
0.20
1.40
0.10
1.60 MAX
0.05 MIN
(0.58)
0.50
0.10
#1
(0.83)
0.50
0.10
100-TQFP-1420A
0.65
0.30
0.10
0.10 MAX
+ 0.10
- 0.05
0.127
PACKAGE DIMENSIONS
Units:millimeters/inches
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